US3183410A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic multipositioning actuators
Assignee: International Business Machines Corp
•
Filing: 1960-12-30
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Granted: 1965-05-11
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Expires: 1980-12-30
Abstract
No abstract record available.
Inventors
- 👤 Flora James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:08
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/04; G05B19/06; G05D; G05D3/00; G05D3/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
115 words
A MAGNETIC POSITIONING DEVICE INCLUDING A TUBULAR SLEEVE MEMBER OF NON-MAGNETIC MATERIAL, A WINDING ARRANGED ABOUT SAID SLEEVE MEMBER, SAID WINDING HAVING INTERCONNECTED TERMINALS AND A PLURALITY OF TAPS INTERMEDIATE SAID TERMINALS, A UNITARY PERMANENT MAGNET ARMATURE OF LENGTH AT LEAST AS GREAT AS THE TOTAL LENGTH OF SAID WINDING BETWEEN THE FIRST AND LAST OF SAID INTERMEDIATE TAPS AND ARRANGED FOR LONGITUDINAL MOVEMENT WITHIN SAID SLEEVE MEMBER, AND MEANS TO APPLY UNIDIRECTIONAL ELECTRIC POTENTIAL BETWEEN SAID INTERCONNECTED TERMINALS AND ONE OF SAID INTERMEDIATE TAPS FOR PRODUCING TWO MAGNETIC FIELDS OF OPPOSING MAGNETIC FLUX ABOUT SAID ARMATURE TO POSITION THE SAME WITHIN SAID SLEEVE MEMBER IN ACCORDANCE WITH THE NULL BETWEEN SAID OPPOSING MAGNETIC FIELDS.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-05-10 | 1968-11-09 | 1969-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-10 | 1972-11-09 | 1973-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-10 | 1976-11-09 | 1977-05-11 | $7700.00 | Window Closed / Lapsed |